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[hh.org.git] / drivers / scsi / lpfc / lpfc_scsi.c
blob97ae98dc95d04f9d13d55a2da8bbc8c51447f564
1 /*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for *
3 * Fibre Channel Host Bus Adapters. *
4 * Copyright (C) 2004-2006 Emulex. All rights reserved. *
5 * EMULEX and SLI are trademarks of Emulex. *
6 * www.emulex.com *
7 * Portions Copyright (C) 2004-2005 Christoph Hellwig *
8 * *
9 * This program is free software; you can redistribute it and/or *
10 * modify it under the terms of version 2 of the GNU General *
11 * Public License as published by the Free Software Foundation. *
12 * This program is distributed in the hope that it will be useful. *
13 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND *
14 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, *
15 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *
16 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
17 * TO BE LEGALLY INVALID. See the GNU General Public License for *
18 * more details, a copy of which can be found in the file COPYING *
19 * included with this package. *
20 *******************************************************************/
21
22 #include <linux/pci.h>
23 #include <linux/interrupt.h>
24 #include <linux/delay.h>
25
26 #include <scsi/scsi.h>
27 #include <scsi/scsi_device.h>
28 #include <scsi/scsi_host.h>
29 #include <scsi/scsi_tcq.h>
30 #include <scsi/scsi_transport_fc.h>
31
32 #include "lpfc_version.h"
33 #include "lpfc_hw.h"
34 #include "lpfc_sli.h"
35 #include "lpfc_disc.h"
36 #include "lpfc_scsi.h"
37 #include "lpfc.h"
38 #include "lpfc_logmsg.h"
39 #include "lpfc_crtn.h"
40
41 #define LPFC_RESET_WAIT 2
42 #define LPFC_ABORT_WAIT 2
43
44
45 /*
46 * This routine allocates a scsi buffer, which contains all the necessary
47 * information needed to initiate a SCSI I/O. The non-DMAable buffer region
48 * contains information to build the IOCB. The DMAable region contains
49 * memory for the FCP CMND, FCP RSP, and the inital BPL. In addition to
50 * allocating memeory, the FCP CMND and FCP RSP BDEs are setup in the BPL
51 * and the BPL BDE is setup in the IOCB.
52 */
53 static struct lpfc_scsi_buf *
54 lpfc_new_scsi_buf(struct lpfc_hba * phba)
55 {
56 struct lpfc_scsi_buf *psb;
57 struct ulp_bde64 *bpl;
58 IOCB_t *iocb;
59 dma_addr_t pdma_phys;
60 uint16_t iotag;
61
62 psb = kmalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
63 if (!psb)
64 return NULL;
65 memset(psb, 0, sizeof (struct lpfc_scsi_buf));
66 psb->scsi_hba = phba;
67
68 /*
69 * Get memory from the pci pool to map the virt space to pci bus space
70 * for an I/O. The DMA buffer includes space for the struct fcp_cmnd,
71 * struct fcp_rsp and the number of bde's necessary to support the
72 * sg_tablesize.
73 */
74 psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, GFP_KERNEL,
75 &psb->dma_handle);
76 if (!psb->data) {
77 kfree(psb);
78 return NULL;
79 }
80
81 /* Initialize virtual ptrs to dma_buf region. */
82 memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
83
84 /* Allocate iotag for psb->cur_iocbq. */
85 iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
86 if (iotag == 0) {
87 pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
88 psb->data, psb->dma_handle);
89 kfree (psb);
90 return NULL;
91 }
92 psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
93
94 psb->fcp_cmnd = psb->data;
95 psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
96 psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
97 sizeof(struct fcp_rsp);
98
99 /* Initialize local short-hand pointers. */
100 bpl = psb->fcp_bpl;
101 pdma_phys = psb->dma_handle;
102
103 /*
104 * The first two bdes are the FCP_CMD and FCP_RSP. The balance are sg
105 * list bdes. Initialize the first two and leave the rest for
106 * queuecommand.
107 */
108 bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
109 bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
110 bpl->tus.f.bdeSize = sizeof (struct fcp_cmnd);
111 bpl->tus.f.bdeFlags = BUFF_USE_CMND;
112 bpl->tus.w = le32_to_cpu(bpl->tus.w);
113 bpl++;
114
115 /* Setup the physical region for the FCP RSP */
116 pdma_phys += sizeof (struct fcp_cmnd);
117 bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
118 bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
119 bpl->tus.f.bdeSize = sizeof (struct fcp_rsp);
120 bpl->tus.f.bdeFlags = (BUFF_USE_CMND | BUFF_USE_RCV);
121 bpl->tus.w = le32_to_cpu(bpl->tus.w);
122
123 /*
124 * Since the IOCB for the FCP I/O is built into this lpfc_scsi_buf,
125 * initialize it with all known data now.
126 */
127 pdma_phys += (sizeof (struct fcp_rsp));
128 iocb = &psb->cur_iocbq.iocb;
129 iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
130 iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys);
131 iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys);
132 iocb->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
133 iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDL;
134 iocb->ulpBdeCount = 1;
135 iocb->ulpClass = CLASS3;
136
137 return psb;
138 }
139
140 static struct lpfc_scsi_buf*
141 lpfc_get_scsi_buf(struct lpfc_hba * phba)
142 {
143 struct lpfc_scsi_buf * lpfc_cmd = NULL;
144 struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
145 unsigned long iflag = 0;
146
147 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
148 list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
149 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
150 return lpfc_cmd;
151 }
152
153 static void
154 lpfc_release_scsi_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * psb)
155 {
156 unsigned long iflag = 0;
157
158 spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
159 psb->pCmd = NULL;
160 list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
161 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
162 }
163
164 static int
165 lpfc_scsi_prep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd)
166 {
167 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
168 struct scatterlist *sgel = NULL;
169 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
170 struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
171 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
172 dma_addr_t physaddr;
173 uint32_t i, num_bde = 0;
174 int datadir = scsi_cmnd->sc_data_direction;
175 int dma_error;
176
177 /*
178 * There are three possibilities here - use scatter-gather segment, use
179 * the single mapping, or neither. Start the lpfc command prep by
180 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
181 * data bde entry.
182 */
183 bpl += 2;
184 if (scsi_cmnd->use_sg) {
185 /*
186 * The driver stores the segment count returned from pci_map_sg
187 * because this a count of dma-mappings used to map the use_sg
188 * pages. They are not guaranteed to be the same for those
189 * architectures that implement an IOMMU.
190 */
191 sgel = (struct scatterlist *)scsi_cmnd->request_buffer;
192 lpfc_cmd->seg_cnt = dma_map_sg(&phba->pcidev->dev, sgel,
193 scsi_cmnd->use_sg, datadir);
194 if (lpfc_cmd->seg_cnt == 0)
195 return 1;
196
197 if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
198 printk(KERN_ERR "%s: Too many sg segments from "
199 "dma_map_sg. Config %d, seg_cnt %d",
200 __FUNCTION__, phba->cfg_sg_seg_cnt,
201 lpfc_cmd->seg_cnt);
202 dma_unmap_sg(&phba->pcidev->dev, sgel,
203 lpfc_cmd->seg_cnt, datadir);
204 return 1;
205 }
206
207 /*
208 * The driver established a maximum scatter-gather segment count
209 * during probe that limits the number of sg elements in any
210 * single scsi command. Just run through the seg_cnt and format
211 * the bde's.
212 */
213 for (i = 0; i < lpfc_cmd->seg_cnt; i++) {
214 physaddr = sg_dma_address(sgel);
215 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
216 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
217 bpl->tus.f.bdeSize = sg_dma_len(sgel);
218 if (datadir == DMA_TO_DEVICE)
219 bpl->tus.f.bdeFlags = 0;
220 else
221 bpl->tus.f.bdeFlags = BUFF_USE_RCV;
222 bpl->tus.w = le32_to_cpu(bpl->tus.w);
223 bpl++;
224 sgel++;
225 num_bde++;
226 }
227 } else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) {
228 physaddr = dma_map_single(&phba->pcidev->dev,
229 scsi_cmnd->request_buffer,
230 scsi_cmnd->request_bufflen,
231 datadir);
232 dma_error = dma_mapping_error(physaddr);
233 if (dma_error) {
234 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
235 "%d:0718 Unable to dma_map_single "
236 "request_buffer: x%x\n",
237 phba->brd_no, dma_error);
238 return 1;
239 }
240
241 lpfc_cmd->nonsg_phys = physaddr;
242 bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
243 bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
244 bpl->tus.f.bdeSize = scsi_cmnd->request_bufflen;
245 if (datadir == DMA_TO_DEVICE)
246 bpl->tus.f.bdeFlags = 0;
247 else
248 bpl->tus.f.bdeFlags = BUFF_USE_RCV;
249 bpl->tus.w = le32_to_cpu(bpl->tus.w);
250 num_bde = 1;
251 bpl++;
252 }
253
254 /*
255 * Finish initializing those IOCB fields that are dependent on the
256 * scsi_cmnd request_buffer. Note that the bdeSize is explicitly
257 * reinitialized since all iocb memory resources are used many times
258 * for transmit, receive, and continuation bpl's.
259 */
260 iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
261 iocb_cmd->un.fcpi64.bdl.bdeSize +=
262 (num_bde * sizeof (struct ulp_bde64));
263 iocb_cmd->ulpBdeCount = 1;
264 iocb_cmd->ulpLe = 1;
265 fcp_cmnd->fcpDl = be32_to_cpu(scsi_cmnd->request_bufflen);
266 return 0;
267 }
268
269 static void
270 lpfc_scsi_unprep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * psb)
271 {
272 /*
273 * There are only two special cases to consider. (1) the scsi command
274 * requested scatter-gather usage or (2) the scsi command allocated
275 * a request buffer, but did not request use_sg. There is a third
276 * case, but it does not require resource deallocation.
277 */
278 if ((psb->seg_cnt > 0) && (psb->pCmd->use_sg)) {
279 dma_unmap_sg(&phba->pcidev->dev, psb->pCmd->request_buffer,
280 psb->seg_cnt, psb->pCmd->sc_data_direction);
281 } else {
282 if ((psb->nonsg_phys) && (psb->pCmd->request_bufflen)) {
283 dma_unmap_single(&phba->pcidev->dev, psb->nonsg_phys,
284 psb->pCmd->request_bufflen,
285 psb->pCmd->sc_data_direction);
286 }
287 }
288 }
289
290 static void
291 lpfc_handle_fcp_err(struct lpfc_scsi_buf *lpfc_cmd)
292 {
293 struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
294 struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
295 struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
296 struct lpfc_hba *phba = lpfc_cmd->scsi_hba;
297 uint32_t fcpi_parm = lpfc_cmd->cur_iocbq.iocb.un.fcpi.fcpi_parm;
298 uint32_t resp_info = fcprsp->rspStatus2;
299 uint32_t scsi_status = fcprsp->rspStatus3;
300 uint32_t host_status = DID_OK;
301 uint32_t rsplen = 0;
302
303 /*
304 * If this is a task management command, there is no
305 * scsi packet associated with this lpfc_cmd. The driver
306 * consumes it.
307 */
308 if (fcpcmd->fcpCntl2) {
309 scsi_status = 0;
310 goto out;
311 }
312
313 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
314 "%d:0730 FCP command failed: RSP "
315 "Data: x%x x%x x%x x%x x%x x%x\n",
316 phba->brd_no, resp_info, scsi_status,
317 be32_to_cpu(fcprsp->rspResId),
318 be32_to_cpu(fcprsp->rspSnsLen),
319 be32_to_cpu(fcprsp->rspRspLen),
320 fcprsp->rspInfo3);
321
322 if (resp_info & RSP_LEN_VALID) {
323 rsplen = be32_to_cpu(fcprsp->rspRspLen);
324 if ((rsplen != 0 && rsplen != 4 && rsplen != 8) ||
325 (fcprsp->rspInfo3 != RSP_NO_FAILURE)) {
326 host_status = DID_ERROR;
327 goto out;
328 }
329 }
330
331 if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
332 uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
333 if (snslen > SCSI_SENSE_BUFFERSIZE)
334 snslen = SCSI_SENSE_BUFFERSIZE;
335
336 memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
337 }
338
339 cmnd->resid = 0;
340 if (resp_info & RESID_UNDER) {
341 cmnd->resid = be32_to_cpu(fcprsp->rspResId);
342
343 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
344 "%d:0716 FCP Read Underrun, expected %d, "
345 "residual %d Data: x%x x%x x%x\n", phba->brd_no,
346 be32_to_cpu(fcpcmd->fcpDl), cmnd->resid,
347 fcpi_parm, cmnd->cmnd[0], cmnd->underflow);
348
349 /*
350 * The cmnd->underflow is the minimum number of bytes that must
351 * be transfered for this command. Provided a sense condition
352 * is not present, make sure the actual amount transferred is at
353 * least the underflow value or fail.
354 */
355 if (!(resp_info & SNS_LEN_VALID) &&
356 (scsi_status == SAM_STAT_GOOD) &&
357 (cmnd->request_bufflen - cmnd->resid) < cmnd->underflow) {
358 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
359 "%d:0717 FCP command x%x residual "
360 "underrun converted to error "
361 "Data: x%x x%x x%x\n", phba->brd_no,
362 cmnd->cmnd[0], cmnd->request_bufflen,
363 cmnd->resid, cmnd->underflow);
364
365 host_status = DID_ERROR;
366 }
367 } else if (resp_info & RESID_OVER) {
368 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
369 "%d:0720 FCP command x%x residual "
370 "overrun error. Data: x%x x%x \n",
371 phba->brd_no, cmnd->cmnd[0],
372 cmnd->request_bufflen, cmnd->resid);
373 host_status = DID_ERROR;
374
375 /*
376 * Check SLI validation that all the transfer was actually done
377 * (fcpi_parm should be zero). Apply check only to reads.
378 */
379 } else if ((scsi_status == SAM_STAT_GOOD) && fcpi_parm &&
380 (cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
381 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
382 "%d:0734 FCP Read Check Error Data: "
383 "x%x x%x x%x x%x\n", phba->brd_no,
384 be32_to_cpu(fcpcmd->fcpDl),
385 be32_to_cpu(fcprsp->rspResId),
386 fcpi_parm, cmnd->cmnd[0]);
387 host_status = DID_ERROR;
388 cmnd->resid = cmnd->request_bufflen;
389 }
390
391 out:
392 cmnd->result = ScsiResult(host_status, scsi_status);
393 }
394
395 static void
396 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
397 struct lpfc_iocbq *pIocbOut)
398 {
399 struct lpfc_scsi_buf *lpfc_cmd =
400 (struct lpfc_scsi_buf *) pIocbIn->context1;
401 struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
402 struct lpfc_nodelist *pnode = rdata->pnode;
403 struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
404 int result;
405 struct scsi_device *sdev, *tmp_sdev;
406 int depth = 0;
407
408 lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
409 lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
410
411 if (lpfc_cmd->status) {
412 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
413 (lpfc_cmd->result & IOERR_DRVR_MASK))
414 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
415 else if (lpfc_cmd->status >= IOSTAT_CNT)
416 lpfc_cmd->status = IOSTAT_DEFAULT;
417
418 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
419 "%d:0729 FCP cmd x%x failed <%d/%d> status: "
420 "x%x result: x%x Data: x%x x%x\n",
421 phba->brd_no, cmd->cmnd[0], cmd->device->id,
422 cmd->device->lun, lpfc_cmd->status,
423 lpfc_cmd->result, pIocbOut->iocb.ulpContext,
424 lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
425
426 switch (lpfc_cmd->status) {
427 case IOSTAT_FCP_RSP_ERROR:
428 /* Call FCP RSP handler to determine result */
429 lpfc_handle_fcp_err(lpfc_cmd);
430 break;
431 case IOSTAT_NPORT_BSY:
432 case IOSTAT_FABRIC_BSY:
433 cmd->result = ScsiResult(DID_BUS_BUSY, 0);
434 break;
435 default:
436 cmd->result = ScsiResult(DID_ERROR, 0);
437 break;
438 }
439
440 if ((pnode == NULL )
441 || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
442 cmd->result = ScsiResult(DID_BUS_BUSY, SAM_STAT_BUSY);
443 } else {
444 cmd->result = ScsiResult(DID_OK, 0);
445 }
446
447 if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
448 uint32_t *lp = (uint32_t *)cmd->sense_buffer;
449
450 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
451 "%d:0710 Iodone <%d/%d> cmd %p, error x%x "
452 "SNS x%x x%x Data: x%x x%x\n",
453 phba->brd_no, cmd->device->id,
454 cmd->device->lun, cmd, cmd->result,
455 *lp, *(lp + 3), cmd->retries, cmd->resid);
456 }
457
458 result = cmd->result;
459 sdev = cmd->device;
460 cmd->scsi_done(cmd);
461
462 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
463 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
464 lpfc_release_scsi_buf(phba, lpfc_cmd);
465 return;
466 }
467
468 if (!result && pnode != NULL &&
469 ((jiffies - pnode->last_ramp_up_time) >
470 LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
471 ((jiffies - pnode->last_q_full_time) >
472 LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
473 (phba->cfg_lun_queue_depth > sdev->queue_depth)) {
474 shost_for_each_device(tmp_sdev, sdev->host) {
475 if (phba->cfg_lun_queue_depth > tmp_sdev->queue_depth) {
476 if (tmp_sdev->id != sdev->id)
477 continue;
478 if (tmp_sdev->ordered_tags)
479 scsi_adjust_queue_depth(tmp_sdev,
480 MSG_ORDERED_TAG,
481 tmp_sdev->queue_depth+1);
482 else
483 scsi_adjust_queue_depth(tmp_sdev,
484 MSG_SIMPLE_TAG,
485 tmp_sdev->queue_depth+1);
486
487 pnode->last_ramp_up_time = jiffies;
488 }
489 }
490 }
491
492 /*
493 * Check for queue full. If the lun is reporting queue full, then
494 * back off the lun queue depth to prevent target overloads.
495 */
496 if (result == SAM_STAT_TASK_SET_FULL && pnode != NULL) {
497 pnode->last_q_full_time = jiffies;
498
499 shost_for_each_device(tmp_sdev, sdev->host) {
500 if (tmp_sdev->id != sdev->id)
501 continue;
502 depth = scsi_track_queue_full(tmp_sdev,
503 tmp_sdev->queue_depth - 1);
504 }
505 /*
506 * The queue depth cannot be lowered any more.
507 * Modify the returned error code to store
508 * the final depth value set by
509 * scsi_track_queue_full.
510 */
511 if (depth == -1)
512 depth = sdev->host->cmd_per_lun;
513
514 if (depth) {
515 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
516 "%d:0711 detected queue full - lun queue depth "
517 " adjusted to %d.\n", phba->brd_no, depth);
518 }
519 }
520
521 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
522 lpfc_release_scsi_buf(phba, lpfc_cmd);
523 }
524
525 static void
526 lpfc_scsi_prep_cmnd(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd,
527 struct lpfc_nodelist *pnode)
528 {
529 struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
530 struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
531 IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
532 struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
533 int datadir = scsi_cmnd->sc_data_direction;
534
535 lpfc_cmd->fcp_rsp->rspSnsLen = 0;
536 /* clear task management bits */
537 lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
538
539 int_to_scsilun(lpfc_cmd->pCmd->device->lun,
540 &lpfc_cmd->fcp_cmnd->fcp_lun);
541
542 memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16);
543
544 if (scsi_cmnd->device->tagged_supported) {
545 switch (scsi_cmnd->tag) {
546 case HEAD_OF_QUEUE_TAG:
547 fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
548 break;
549 case ORDERED_QUEUE_TAG:
550 fcp_cmnd->fcpCntl1 = ORDERED_Q;
551 break;
552 default:
553 fcp_cmnd->fcpCntl1 = SIMPLE_Q;
554 break;
555 }
556 } else
557 fcp_cmnd->fcpCntl1 = 0;
558
559 /*
560 * There are three possibilities here - use scatter-gather segment, use
561 * the single mapping, or neither. Start the lpfc command prep by
562 * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
563 * data bde entry.
564 */
565 if (scsi_cmnd->use_sg) {
566 if (datadir == DMA_TO_DEVICE) {
567 iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
568 iocb_cmd->un.fcpi.fcpi_parm = 0;
569 iocb_cmd->ulpPU = 0;
570 fcp_cmnd->fcpCntl3 = WRITE_DATA;
571 phba->fc4OutputRequests++;
572 } else {
573 iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
574 iocb_cmd->ulpPU = PARM_READ_CHECK;
575 iocb_cmd->un.fcpi.fcpi_parm =
576 scsi_cmnd->request_bufflen;
577 fcp_cmnd->fcpCntl3 = READ_DATA;
578 phba->fc4InputRequests++;
579 }
580 } else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) {
581 if (datadir == DMA_TO_DEVICE) {
582 iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
583 iocb_cmd->un.fcpi.fcpi_parm = 0;
584 iocb_cmd->ulpPU = 0;
585 fcp_cmnd->fcpCntl3 = WRITE_DATA;
586 phba->fc4OutputRequests++;
587 } else {
588 iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
589 iocb_cmd->ulpPU = PARM_READ_CHECK;
590 iocb_cmd->un.fcpi.fcpi_parm =
591 scsi_cmnd->request_bufflen;
592 fcp_cmnd->fcpCntl3 = READ_DATA;
593 phba->fc4InputRequests++;
594 }
595 } else {
596 iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
597 iocb_cmd->un.fcpi.fcpi_parm = 0;
598 iocb_cmd->ulpPU = 0;
599 fcp_cmnd->fcpCntl3 = 0;
600 phba->fc4ControlRequests++;
601 }
602
603 /*
604 * Finish initializing those IOCB fields that are independent
605 * of the scsi_cmnd request_buffer
606 */
607 piocbq->iocb.ulpContext = pnode->nlp_rpi;
608 if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
609 piocbq->iocb.ulpFCP2Rcvy = 1;
610
611 piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
612 piocbq->context1 = lpfc_cmd;
613 piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
614 piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
615 }
616
617 static int
618 lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_hba *phba,
619 struct lpfc_scsi_buf *lpfc_cmd,
620 unsigned int lun,
621 uint8_t task_mgmt_cmd)
622 {
623 struct lpfc_sli *psli;
624 struct lpfc_iocbq *piocbq;
625 IOCB_t *piocb;
626 struct fcp_cmnd *fcp_cmnd;
627 struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
628 struct lpfc_nodelist *ndlp = rdata->pnode;
629
630 if ((ndlp == NULL) || (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
631 return 0;
632 }
633
634 psli = &phba->sli;
635 piocbq = &(lpfc_cmd->cur_iocbq);
636 piocb = &piocbq->iocb;
637
638 fcp_cmnd = lpfc_cmd->fcp_cmnd;
639 int_to_scsilun(lun, &lpfc_cmd->fcp_cmnd->fcp_lun);
640 fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
641
642 piocb->ulpCommand = CMD_FCP_ICMND64_CR;
643
644 piocb->ulpContext = ndlp->nlp_rpi;
645 if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
646 piocb->ulpFCP2Rcvy = 1;
647 }
648 piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
649
650 /* ulpTimeout is only one byte */
651 if (lpfc_cmd->timeout > 0xff) {
652 /*
653 * Do not timeout the command at the firmware level.
654 * The driver will provide the timeout mechanism.
655 */
656 piocb->ulpTimeout = 0;
657 } else {
658 piocb->ulpTimeout = lpfc_cmd->timeout;
659 }
660
661 return (1);
662 }
663
664 static int
665 lpfc_scsi_tgt_reset(struct lpfc_scsi_buf * lpfc_cmd, struct lpfc_hba * phba,
666 unsigned tgt_id, unsigned int lun,
667 struct lpfc_rport_data *rdata)
668 {
669 struct lpfc_iocbq *iocbq;
670 struct lpfc_iocbq *iocbqrsp;
671 int ret;
672
673 lpfc_cmd->rdata = rdata;
674 ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, lun,
675 FCP_TARGET_RESET);
676 if (!ret)
677 return FAILED;
678
679 lpfc_cmd->scsi_hba = phba;
680 iocbq = &lpfc_cmd->cur_iocbq;
681 iocbqrsp = lpfc_sli_get_iocbq(phba);
682
683 if (!iocbqrsp)
684 return FAILED;
685
686 /* Issue Target Reset to TGT <num> */
687 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
688 "%d:0702 Issue Target Reset to TGT %d "
689 "Data: x%x x%x\n",
690 phba->brd_no, tgt_id, rdata->pnode->nlp_rpi,
691 rdata->pnode->nlp_flag);
692
693 ret = lpfc_sli_issue_iocb_wait(phba,
694 &phba->sli.ring[phba->sli.fcp_ring],
695 iocbq, iocbqrsp, lpfc_cmd->timeout);
696 if (ret != IOCB_SUCCESS) {
697 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
698 ret = FAILED;
699 } else {
700 ret = SUCCESS;
701 lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
702 lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
703 if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
704 (lpfc_cmd->result & IOERR_DRVR_MASK))
705 lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
706 }
707
708 lpfc_sli_release_iocbq(phba, iocbqrsp);
709 return ret;
710 }
711
712 const char *
713 lpfc_info(struct Scsi_Host *host)
714 {
715 struct lpfc_hba *phba = (struct lpfc_hba *) host->hostdata;
716 int len;
717 static char lpfcinfobuf[384];
718
719 memset(lpfcinfobuf,0,384);
720 if (phba && phba->pcidev){
721 strncpy(lpfcinfobuf, phba->ModelDesc, 256);
722 len = strlen(lpfcinfobuf);
723 snprintf(lpfcinfobuf + len,
724 384-len,
725 " on PCI bus %02x device %02x irq %d",
726 phba->pcidev->bus->number,
727 phba->pcidev->devfn,
728 phba->pcidev->irq);
729 len = strlen(lpfcinfobuf);
730 if (phba->Port[0]) {
731 snprintf(lpfcinfobuf + len,
732 384-len,
733 " port %s",
734 phba->Port);
735 }
736 }
737 return lpfcinfobuf;
738 }
739
740 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
741 {
742 unsigned long poll_tmo_expires =
743 (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));
744
745 if (phba->sli.ring[LPFC_FCP_RING].txcmplq_cnt)
746 mod_timer(&phba->fcp_poll_timer,
747 poll_tmo_expires);
748 }
749
750 void lpfc_poll_start_timer(struct lpfc_hba * phba)
751 {
752 lpfc_poll_rearm_timer(phba);
753 }
754
755 void lpfc_poll_timeout(unsigned long ptr)
756 {
757 struct lpfc_hba *phba = (struct lpfc_hba *)ptr;
758 unsigned long iflag;
759
760 spin_lock_irqsave(phba->host->host_lock, iflag);
761
762 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
763 lpfc_sli_poll_fcp_ring (phba);
764 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
765 lpfc_poll_rearm_timer(phba);
766 }
767
768 spin_unlock_irqrestore(phba->host->host_lock, iflag);
769 }
770
771 static int
772 lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
773 {
774 struct lpfc_hba *phba =
775 (struct lpfc_hba *) cmnd->device->host->hostdata;
776 struct lpfc_sli *psli = &phba->sli;
777 struct lpfc_rport_data *rdata = cmnd->device->hostdata;
778 struct lpfc_nodelist *ndlp = rdata->pnode;
779 struct lpfc_scsi_buf *lpfc_cmd;
780 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
781 int err;
782
783 err = fc_remote_port_chkready(rport);
784 if (err) {
785 cmnd->result = err;
786 goto out_fail_command;
787 }
788
789 /*
790 * Catch race where our node has transitioned, but the
791 * transport is still transitioning.
792 */
793 if (!ndlp) {
794 cmnd->result = ScsiResult(DID_BUS_BUSY, 0);
795 goto out_fail_command;
796 }
797 lpfc_cmd = lpfc_get_scsi_buf (phba);
798 if (lpfc_cmd == NULL) {
799 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
800 "%d:0707 driver's buffer pool is empty, "
801 "IO busied\n", phba->brd_no);
802 goto out_host_busy;
803 }
804
805 /*
806 * Store the midlayer's command structure for the completion phase
807 * and complete the command initialization.
808 */
809 lpfc_cmd->pCmd = cmnd;
810 lpfc_cmd->rdata = rdata;
811 lpfc_cmd->timeout = 0;
812 cmnd->host_scribble = (unsigned char *)lpfc_cmd;
813 cmnd->scsi_done = done;
814
815 err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
816 if (err)
817 goto out_host_busy_free_buf;
818
819 lpfc_scsi_prep_cmnd(phba, lpfc_cmd, ndlp);
820
821 err = lpfc_sli_issue_iocb(phba, &phba->sli.ring[psli->fcp_ring],
822 &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
823 if (err)
824 goto out_host_busy_free_buf;
825
826 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
827 lpfc_sli_poll_fcp_ring(phba);
828 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
829 lpfc_poll_rearm_timer(phba);
830 }
831
832 return 0;
833
834 out_host_busy_free_buf:
835 lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
836 lpfc_release_scsi_buf(phba, lpfc_cmd);
837 out_host_busy:
838 return SCSI_MLQUEUE_HOST_BUSY;
839
840 out_fail_command:
841 done(cmnd);
842 return 0;
843 }
844
845 static void
846 lpfc_block_error_handler(struct scsi_cmnd *cmnd)
847 {
848 struct Scsi_Host *shost = cmnd->device->host;
849 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
850
851 spin_lock_irq(shost->host_lock);
852 while (rport->port_state == FC_PORTSTATE_BLOCKED) {
853 spin_unlock_irq(shost->host_lock);
854 msleep(1000);
855 spin_lock_irq(shost->host_lock);
856 }
857 spin_unlock_irq(shost->host_lock);
858 return;
859 }
860
861 static int
862 lpfc_abort_handler(struct scsi_cmnd *cmnd)
863 {
864 struct Scsi_Host *shost = cmnd->device->host;
865 struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata;
866 struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring];
867 struct lpfc_iocbq *iocb;
868 struct lpfc_iocbq *abtsiocb;
869 struct lpfc_scsi_buf *lpfc_cmd;
870 IOCB_t *cmd, *icmd;
871 unsigned int loop_count = 0;
872 int ret = SUCCESS;
873
874 lpfc_block_error_handler(cmnd);
875 spin_lock_irq(shost->host_lock);
876
877 lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
878 BUG_ON(!lpfc_cmd);
879
880 /*
881 * If pCmd field of the corresponding lpfc_scsi_buf structure
882 * points to a different SCSI command, then the driver has
883 * already completed this command, but the midlayer did not
884 * see the completion before the eh fired. Just return
885 * SUCCESS.
886 */
887 iocb = &lpfc_cmd->cur_iocbq;
888 if (lpfc_cmd->pCmd != cmnd)
889 goto out;
890
891 BUG_ON(iocb->context1 != lpfc_cmd);
892
893 abtsiocb = lpfc_sli_get_iocbq(phba);
894 if (abtsiocb == NULL) {
895 ret = FAILED;
896 goto out;
897 }
898
899 /*
900 * The scsi command can not be in txq and it is in flight because the
901 * pCmd is still pointig at the SCSI command we have to abort. There
902 * is no need to search the txcmplq. Just send an abort to the FW.
903 */
904
905 cmd = &iocb->iocb;
906 icmd = &abtsiocb->iocb;
907 icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
908 icmd->un.acxri.abortContextTag = cmd->ulpContext;
909 icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
910
911 icmd->ulpLe = 1;
912 icmd->ulpClass = cmd->ulpClass;
913 if (phba->hba_state >= LPFC_LINK_UP)
914 icmd->ulpCommand = CMD_ABORT_XRI_CN;
915 else
916 icmd->ulpCommand = CMD_CLOSE_XRI_CN;
917
918 abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
919 if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) == IOCB_ERROR) {
920 lpfc_sli_release_iocbq(phba, abtsiocb);
921 ret = FAILED;
922 goto out;
923 }
924
925 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
926 lpfc_sli_poll_fcp_ring (phba);
927
928 /* Wait for abort to complete */
929 while (lpfc_cmd->pCmd == cmnd)
930 {
931 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
932 lpfc_sli_poll_fcp_ring (phba);
933
934 spin_unlock_irq(phba->host->host_lock);
935 schedule_timeout_uninterruptible(LPFC_ABORT_WAIT*HZ);
936 spin_lock_irq(phba->host->host_lock);
937 if (++loop_count
938 > (2 * phba->cfg_devloss_tmo)/LPFC_ABORT_WAIT)
939 break;
940 }
941
942 if (lpfc_cmd->pCmd == cmnd) {
943 ret = FAILED;
944 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
945 "%d:0748 abort handler timed out waiting for "
946 "abort to complete: ret %#x, ID %d, LUN %d, "
947 "snum %#lx\n",
948 phba->brd_no, ret, cmnd->device->id,
949 cmnd->device->lun, cmnd->serial_number);
950 }
951
952 out:
953 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
954 "%d:0749 SCSI Layer I/O Abort Request "
955 "Status x%x ID %d LUN %d snum %#lx\n",
956 phba->brd_no, ret, cmnd->device->id,
957 cmnd->device->lun, cmnd->serial_number);
958
959 spin_unlock_irq(shost->host_lock);
960
961 return ret;
962 }
963
964 static int
965 lpfc_reset_lun_handler(struct scsi_cmnd *cmnd)
966 {
967 struct Scsi_Host *shost = cmnd->device->host;
968 struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata;
969 struct lpfc_scsi_buf *lpfc_cmd;
970 struct lpfc_iocbq *iocbq, *iocbqrsp;
971 struct lpfc_rport_data *rdata = cmnd->device->hostdata;
972 struct lpfc_nodelist *pnode = rdata->pnode;
973 uint32_t cmd_result = 0, cmd_status = 0;
974 int ret = FAILED;
975 int cnt, loopcnt;
976
977 lpfc_block_error_handler(cmnd);
978 spin_lock_irq(shost->host_lock);
979 /*
980 * If target is not in a MAPPED state, delay the reset until
981 * target is rediscovered or devloss timeout expires.
982 */
983 while ( 1 ) {
984 if (!pnode)
985 break;
986
987 if (pnode->nlp_state != NLP_STE_MAPPED_NODE) {
988 spin_unlock_irq(phba->host->host_lock);
989 schedule_timeout_uninterruptible(msecs_to_jiffies(500));
990 spin_lock_irq(phba->host->host_lock);
991 }
992 if ((pnode) && (pnode->nlp_state == NLP_STE_MAPPED_NODE))
993 break;
994 }
995
996 lpfc_cmd = lpfc_get_scsi_buf (phba);
997 if (lpfc_cmd == NULL)
998 goto out;
999
1000 lpfc_cmd->timeout = 60;
1001 lpfc_cmd->scsi_hba = phba;
1002 lpfc_cmd->rdata = rdata;
1003
1004 ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, cmnd->device->lun,
1005 FCP_LUN_RESET);
1006 if (!ret)
1007 goto out_free_scsi_buf;
1008
1009 iocbq = &lpfc_cmd->cur_iocbq;
1010
1011 /* get a buffer for this IOCB command response */
1012 iocbqrsp = lpfc_sli_get_iocbq(phba);
1013 if (iocbqrsp == NULL)
1014 goto out_free_scsi_buf;
1015
1016 lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
1017 "%d:0703 Issue LUN Reset to TGT %d LUN %d "
1018 "Data: x%x x%x\n", phba->brd_no, cmnd->device->id,
1019 cmnd->device->lun, pnode->nlp_rpi, pnode->nlp_flag);
1020
1021 ret = lpfc_sli_issue_iocb_wait(phba,
1022 &phba->sli.ring[phba->sli.fcp_ring],
1023 iocbq, iocbqrsp, lpfc_cmd->timeout);
1024 if (ret == IOCB_SUCCESS)
1025 ret = SUCCESS;
1026
1027
1028 cmd_result = iocbqrsp->iocb.un.ulpWord[4];
1029 cmd_status = iocbqrsp->iocb.ulpStatus;
1030
1031 lpfc_sli_release_iocbq(phba, iocbqrsp);
1032
1033 /*
1034 * All outstanding txcmplq I/Os should have been aborted by the device.
1035 * Unfortunately, some targets do not abide by this forcing the driver
1036 * to double check.
1037 */
1038 cnt = lpfc_sli_sum_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
1039 cmnd->device->id, cmnd->device->lun,
1040 LPFC_CTX_LUN);
1041 if (cnt)
1042 lpfc_sli_abort_iocb(phba,
1043 &phba->sli.ring[phba->sli.fcp_ring],
1044 cmnd->device->id, cmnd->device->lun,
1045 0, LPFC_CTX_LUN);
1046 loopcnt = 0;
1047 while(cnt) {
1048 spin_unlock_irq(phba->host->host_lock);
1049 schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
1050 spin_lock_irq(phba->host->host_lock);
1051
1052 if (++loopcnt
1053 > (2 * phba->cfg_devloss_tmo)/LPFC_RESET_WAIT)
1054 break;
1055
1056 cnt = lpfc_sli_sum_iocb(phba,
1057 &phba->sli.ring[phba->sli.fcp_ring],
1058 cmnd->device->id, cmnd->device->lun,
1059 LPFC_CTX_LUN);
1060 }
1061
1062 if (cnt) {
1063 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1064 "%d:0719 LUN Reset I/O flush failure: cnt x%x\n",
1065 phba->brd_no, cnt);
1066 ret = FAILED;
1067 }
1068
1069 out_free_scsi_buf:
1070 lpfc_release_scsi_buf(phba, lpfc_cmd);
1071
1072 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1073 "%d:0713 SCSI layer issued LUN reset (%d, %d) "
1074 "Data: x%x x%x x%x\n",
1075 phba->brd_no, cmnd->device->id,cmnd->device->lun,
1076 ret, cmd_status, cmd_result);
1077
1078 out:
1079 spin_unlock_irq(shost->host_lock);
1080 return ret;
1081 }
1082
1083 static int
1084 lpfc_reset_bus_handler(struct scsi_cmnd *cmnd)
1085 {
1086 struct Scsi_Host *shost = cmnd->device->host;
1087 struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata;
1088 struct lpfc_nodelist *ndlp = NULL;
1089 int match;
1090 int ret = FAILED, i, err_count = 0;
1091 int cnt, loopcnt;
1092 struct lpfc_scsi_buf * lpfc_cmd;
1093
1094 lpfc_block_error_handler(cmnd);
1095 spin_lock_irq(shost->host_lock);
1096
1097 lpfc_cmd = lpfc_get_scsi_buf(phba);
1098 if (lpfc_cmd == NULL)
1099 goto out;
1100
1101 /* The lpfc_cmd storage is reused. Set all loop invariants. */
1102 lpfc_cmd->timeout = 60;
1103 lpfc_cmd->scsi_hba = phba;
1104
1105 /*
1106 * Since the driver manages a single bus device, reset all
1107 * targets known to the driver. Should any target reset
1108 * fail, this routine returns failure to the midlayer.
1109 */
1110 for (i = 0; i < LPFC_MAX_TARGET; i++) {
1111 /* Search the mapped list for this target ID */
1112 match = 0;
1113 list_for_each_entry(ndlp, &phba->fc_nlpmap_list, nlp_listp) {
1114 if ((i == ndlp->nlp_sid) && ndlp->rport) {
1115 match = 1;
1116 break;
1117 }
1118 }
1119 if (!match)
1120 continue;
1121
1122 ret = lpfc_scsi_tgt_reset(lpfc_cmd, phba, i, cmnd->device->lun,
1123 ndlp->rport->dd_data);
1124 if (ret != SUCCESS) {
1125 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1126 "%d:0700 Bus Reset on target %d failed\n",
1127 phba->brd_no, i);
1128 err_count++;
1129 }
1130 }
1131
1132 if (err_count == 0)
1133 ret = SUCCESS;
1134
1135 lpfc_release_scsi_buf(phba, lpfc_cmd);
1136
1137 /*
1138 * All outstanding txcmplq I/Os should have been aborted by
1139 * the targets. Unfortunately, some targets do not abide by
1140 * this forcing the driver to double check.
1141 */
1142 cnt = lpfc_sli_sum_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
1143 0, 0, LPFC_CTX_HOST);
1144 if (cnt)
1145 lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
1146 0, 0, 0, LPFC_CTX_HOST);
1147 loopcnt = 0;
1148 while(cnt) {
1149 spin_unlock_irq(phba->host->host_lock);
1150 schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
1151 spin_lock_irq(phba->host->host_lock);
1152
1153 if (++loopcnt
1154 > (2 * phba->cfg_devloss_tmo)/LPFC_RESET_WAIT)
1155 break;
1156
1157 cnt = lpfc_sli_sum_iocb(phba,
1158 &phba->sli.ring[phba->sli.fcp_ring],
1159 0, 0, LPFC_CTX_HOST);
1160 }
1161
1162 if (cnt) {
1163 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1164 "%d:0715 Bus Reset I/O flush failure: cnt x%x left x%x\n",
1165 phba->brd_no, cnt, i);
1166 ret = FAILED;
1167 }
1168
1169 lpfc_printf_log(phba,
1170 KERN_ERR,
1171 LOG_FCP,
1172 "%d:0714 SCSI layer issued Bus Reset Data: x%x\n",
1173 phba->brd_no, ret);
1174 out:
1175 spin_unlock_irq(shost->host_lock);
1176 return ret;
1177 }
1178
1179 static int
1180 lpfc_slave_alloc(struct scsi_device *sdev)
1181 {
1182 struct lpfc_hba *phba = (struct lpfc_hba *)sdev->host->hostdata;
1183 struct lpfc_scsi_buf *scsi_buf = NULL;
1184 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
1185 uint32_t total = 0, i;
1186 uint32_t num_to_alloc = 0;
1187 unsigned long flags;
1188
1189 if (!rport || fc_remote_port_chkready(rport))
1190 return -ENXIO;
1191
1192 sdev->hostdata = rport->dd_data;
1193
1194 /*
1195 * Populate the cmds_per_lun count scsi_bufs into this host's globally
1196 * available list of scsi buffers. Don't allocate more than the
1197 * HBA limit conveyed to the midlayer via the host structure. The
1198 * formula accounts for the lun_queue_depth + error handlers + 1
1199 * extra. This list of scsi bufs exists for the lifetime of the driver.
1200 */
1201 total = phba->total_scsi_bufs;
1202 num_to_alloc = phba->cfg_lun_queue_depth + 2;
1203 if (total >= phba->cfg_hba_queue_depth) {
1204 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
1205 "%d:0704 At limitation of %d preallocated "
1206 "command buffers\n", phba->brd_no, total);
1207 return 0;
1208 } else if (total + num_to_alloc > phba->cfg_hba_queue_depth) {
1209 lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
1210 "%d:0705 Allocation request of %d command "
1211 "buffers will exceed max of %d. Reducing "
1212 "allocation request to %d.\n", phba->brd_no,
1213 num_to_alloc, phba->cfg_hba_queue_depth,
1214 (phba->cfg_hba_queue_depth - total));
1215 num_to_alloc = phba->cfg_hba_queue_depth - total;
1216 }
1217
1218 for (i = 0; i < num_to_alloc; i++) {
1219 scsi_buf = lpfc_new_scsi_buf(phba);
1220 if (!scsi_buf) {
1221 lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1222 "%d:0706 Failed to allocate command "
1223 "buffer\n", phba->brd_no);
1224 break;
1225 }
1226
1227 spin_lock_irqsave(&phba->scsi_buf_list_lock, flags);
1228 phba->total_scsi_bufs++;
1229 list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list);
1230 spin_unlock_irqrestore(&phba->scsi_buf_list_lock, flags);
1231 }
1232 return 0;
1233 }
1234
1235 static int
1236 lpfc_slave_configure(struct scsi_device *sdev)
1237 {
1238 struct lpfc_hba *phba = (struct lpfc_hba *) sdev->host->hostdata;
1239 struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
1240
1241 if (sdev->tagged_supported)
1242 scsi_activate_tcq(sdev, phba->cfg_lun_queue_depth);
1243 else
1244 scsi_deactivate_tcq(sdev, phba->cfg_lun_queue_depth);
1245
1246 /*
1247 * Initialize the fc transport attributes for the target
1248 * containing this scsi device. Also note that the driver's
1249 * target pointer is stored in the starget_data for the
1250 * driver's sysfs entry point functions.
1251 */
1252 rport->dev_loss_tmo = phba->cfg_devloss_tmo;
1253
1254 if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
1255 lpfc_sli_poll_fcp_ring(phba);
1256 if (phba->cfg_poll & DISABLE_FCP_RING_INT)
1257 lpfc_poll_rearm_timer(phba);
1258 }
1259
1260 return 0;
1261 }
1262
1263 static void
1264 lpfc_slave_destroy(struct scsi_device *sdev)
1265 {
1266 sdev->hostdata = NULL;
1267 return;
1268 }
1269
1270 struct scsi_host_template lpfc_template = {
1271 .module = THIS_MODULE,
1272 .name = LPFC_DRIVER_NAME,
1273 .info = lpfc_info,
1274 .queuecommand = lpfc_queuecommand,
1275 .eh_abort_handler = lpfc_abort_handler,
1276 .eh_device_reset_handler= lpfc_reset_lun_handler,
1277 .eh_bus_reset_handler = lpfc_reset_bus_handler,
1278 .slave_alloc = lpfc_slave_alloc,
1279 .slave_configure = lpfc_slave_configure,
1280 .slave_destroy = lpfc_slave_destroy,
1281 .this_id = -1,
1282 .sg_tablesize = LPFC_SG_SEG_CNT,
1283 .cmd_per_lun = LPFC_CMD_PER_LUN,
1284 .use_clustering = ENABLE_CLUSTERING,
1285 .shost_attrs = lpfc_host_attrs,
1286 .max_sectors = 0xFFFF,
1287 };
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